>Driving around 2.5 ton cars with huge batteries you normally use 5-20% of the capacity is also kind of stupid

Well, now you exchange a ton of batteries for a ton of hydrogen storage, motor, and all the tech you need to make the hydrogen work. And by your own scenario, you are dragging that around most of the time, when you don't actually need it. Also, don't forget all the tech you need to connect those two systems.

I currently have an SR+. We take it on long vacations and it's just fine for that.

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>You also got to take into account that we have to overbuild renewables by a lot.

I agree with this statement, but not the conclusion you make from it. Honestly, we have no idea what is going to have when we reach super power. This is simply not a situation we have ever had outside of very small, local, temporary scenarios.

It's not like the equipment to create that hydrogen is free to build or maintain. The question will be: is the stored hydrogen we get from it worth the construction and maintenance cost?